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Static variable

 
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Static variable Is Thread Safe?
 
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No, static variables are not automatically thread-safe. You'll have to take care of synchronization if you have multiple threads that are accessing a static variable simultaneously.
 
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Hello,

Static variable should be changed inside static syncronised methods in order to be thread-safe.
Two threads that access a static syncronized method, will always block each other, regardless if they are using the same instance or two different instances.
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